syzkaller login: [ 91.686385] BUG: Bad rss-counter state mm:00000000ad02faf1 type:MM_FILEPAGES val:33 [ 91.687754] BUG: Bad rss-counter state mm:00000000ad02faf1 type:MM_ANONPAGES val:22 [ 91.823507] ================================================================== [ 91.824569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 91.825702] Read of size 8 at addr ffff88800eb21140 by task sshd/220 [ 91.826514] [ 91.826706] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 91.827597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 91.828461] Call Trace: [ 91.828739] [ 91.828986] dump_stack_lvl+0x91/0xf0 [ 91.829414] print_report+0xcc/0x620 [ 91.829853] ? __virt_addr_valid+0x102/0x340 [ 91.830340] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.830881] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.831420] kasan_report+0xbe/0xf0 [ 91.831831] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.832372] vma_interval_tree_remove+0xc75/0xec0 [ 91.832902] vma_prepare+0xc54/0x11a0 [ 91.833328] __split_vma+0x5af/0x950 [ 91.833763] ? __pfx___split_vma+0x10/0x10 [ 91.834218] ? find_held_lock+0x2c/0x110 [ 91.834669] do_vmi_align_munmap+0x2ba/0x11f0 [ 91.835172] ? lock_is_held_type+0x9f/0x120 [ 91.835641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 91.836176] ? mtree_range_walk+0x632/0x900 [ 91.836664] ? mas_walk+0x5c7/0x7c0 [ 91.837077] do_vmi_munmap+0x1f1/0x2b0 [ 91.837513] mmap_region+0x1f9/0x2660 [ 91.837931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 91.838378] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 91.839203] ? __pfx_lock_acquire+0x10/0x10 [ 91.839820] ? __pfx_mmap_region+0x10/0x10 [ 91.840460] ? security_mmap_addr+0x7d/0xa0 [ 91.841087] ? get_unmapped_area+0x1f5/0x3f0 [ 91.841771] do_mmap+0x854/0xf00 [ 91.842287] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.842863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 91.843443] ksys_mmap_pgoff+0x3af/0x500 [ 91.843897] do_syscall_64+0x3f/0x90 [ 91.844290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.844817] RIP: 0033:0x7f0fd3170d82 [ 91.845189] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 91.847107] RSP: 002b:00007ffdb039b7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 91.847898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fd3170d82 [ 91.848631] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fd25aa000 [ 91.849371] RBP: 00007f0fd25aa000 R08: 0000000000000009 R09: 0000000000001000 [ 91.850145] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561161a31980 [ 91.850884] R13: 00007ffdb039b7c0 R14: 00007ffdb039b7f0 R15: 00007ffdb039bb50 [ 91.851632] [ 91.851883] [ 91.852072] Allocated by task 212: [ 91.852446] kasan_save_stack+0x22/0x50 [ 91.852887] kasan_set_track+0x25/0x30 [ 91.853316] __kasan_slab_alloc+0x59/0x70 [ 91.853812] kmem_cache_alloc+0x16b/0x370 [ 91.854263] vm_area_dup+0x20/0x160 [ 91.854653] __split_vma+0x170/0x950 [ 91.855059] split_vma+0xc6/0x110 [ 91.855441] mprotect_fixup+0x8d2/0xb30 [ 91.855879] do_mprotect_pkey+0x87e/0xd40 [ 91.856339] __x64_sys_mprotect+0x78/0xc0 [ 91.856785] do_syscall_64+0x3f/0x90 [ 91.857192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.857790] [ 91.857976] Freed by task 212: [ 91.858317] kasan_save_stack+0x22/0x50 [ 91.858754] kasan_set_track+0x25/0x30 [ 91.859184] kasan_save_free_info+0x2b/0x50 [ 91.859648] __kasan_slab_free+0x10a/0x190 [ 91.860105] kmem_cache_free+0x10d/0x4d0 [ 91.860545] rcu_core+0x8c8/0x2860 [ 91.860940] __do_softirq+0x1b7/0x7d4 [ 91.861362] [ 91.861592] Last potentially related work creation: [ 91.862101] kasan_save_stack+0x22/0x50 [ 91.862535] __kasan_record_aux_stack+0x8e/0xa0 [ 91.863029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.863591] remove_vma+0x139/0x170 [ 91.863983] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.864469] do_vmi_munmap+0x1f1/0x2b0 [ 91.864891] __vm_munmap+0x138/0x3a0 [ 91.865303] __x64_sys_munmap+0x59/0x80 [ 91.865778] do_syscall_64+0x3f/0x90 [ 91.866207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.866763] [ 91.866949] Second to last potentially related work creation: [ 91.867545] kasan_save_stack+0x22/0x50 [ 91.867977] __kasan_record_aux_stack+0x8e/0xa0 [ 91.868477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.869036] remove_vma+0x139/0x170 [ 91.869475] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.869969] do_vmi_munmap+0x1f1/0x2b0 [ 91.870390] mmap_region+0x1f9/0x2660 [ 91.870808] do_mmap+0x854/0xf00 [ 91.871180] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.871610] ksys_mmap_pgoff+0x3af/0x500 [ 91.872060] do_syscall_64+0x3f/0x90 [ 91.872486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.873078] [ 91.873287] The buggy address belongs to the object at ffff88800eb210e8 [ 91.873287] which belongs to the cache vm_area_struct of size 168 [ 91.874701] The buggy address is located 88 bytes inside of [ 91.874701] freed 168-byte region [ffff88800eb210e8, ffff88800eb21190) [ 91.876017] [ 91.876234] The buggy address belongs to the physical page: [ 91.876823] page:00000000dd56e7f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb21 [ 91.877885] memcg:ffff88800eb41d01 [ 91.878290] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 91.878946] page_type: 0xffffffff() [ 91.879391] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 91.880256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb41d01 [ 91.881111] page dumped because: kasan: bad access detected [ 91.881760] [ 91.881991] Memory state around the buggy address: [ 91.882528] ffff88800eb21000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 91.883354] ffff88800eb21080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 91.884166] >ffff88800eb21100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.884969] ^ [ 91.885604] ffff88800eb21180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 91.886426] ffff88800eb21200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 91.887218] ================================================================== [ 91.888185] Disabling lock debugging due to kernel taint [ 94.140754] BUG: Bad rss-counter state mm:00000000d518e24a type:MM_FILEPAGES val:33 [ 94.141547] BUG: Bad rss-counter state mm:00000000d518e24a type:MM_ANONPAGES val:22 [ 94.504830] BUG: Bad rss-counter state mm:00000000c0081573 type:MM_FILEPAGES val:33 [ 94.505905] BUG: Bad rss-counter state mm:00000000c0081573 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65312' (ECDSA) to the list of known hosts. 2023/06/19 19:11:48 fuzzer started 2023/06/19 19:11:48 dialing manager at localhost:44161 2023/06/19 19:11:48 checking machine... 2023/06/19 19:11:48 checking revisions... [ 95.110218] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:11:48 testing simple program... [ 95.163640] cgroup: Unknown subsys name 'net' [ 95.209653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa666241f40 CR3=000000000e418000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038343a31313a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a31313a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11003381f41 RSP=ffff888019c0f9f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff8880093db980 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f26607ee900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2660bba328 CR3=000000001c8d0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000